Don, still no sidetone or ability to change XFIL ! I have done the following:
1) I checked C72 and RP3 solder joints carefully (with a magnifier), and although they looked fine, I reheated them briefly. 2) I checked the solder joints on U2 two ways: I reheated the joints carefully. I also checked continuity, e.g., U2 pin 1 to J1 pin 5 connector; U2 pin 7 to top of R13, etc. I also examined the joints with a glass. 3) I then made a change in STP and also STL, but no sidetone. I then reset to factory defaults per page 57; no sidetone. I then had to recalibrate the OPF per page 53, as expected. I also checked VDD on U2 pin 7 and it's 6.14 volts. 4) XFIL is also (still) not changing, so I think the problem is on the XFIL/TONE line. However, the filter position sounds like the 'wide' FL1 position,whereas it sounded like FL3 when I started to work on it this past week. I changed the power out again to make sure it's still working fine after installing U2, and confirmed the power change on the S-meter on the FT-950, so OUTB is working fine. The XFIL switch and sidetone worked perfectly from the start, until my camping trip. What surprises me most is that the K1 was held in a 'cradle' which was screwed down to the dinette table in my camper, at an angle of perhaps 70 degrees. So it seems hard to believe the "loose nut" (which may or may not have caused the problem, and which was lodged behind the leads of RF U5 LM2930T-8) could have gotten into the Front Panel. I checked the voltage output of the LM2930 early on and it's fine. The receiver and transmitter appear to be operating normally, using my FT-950 as a reference. Sorry for such a long email ! and I greatly appreciate your help. David tone ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
